Answer:
A bicycle locked to a bike
Explanation:
The kinetic energy of an object when an object is moving. The mathematical expression for the kinetic energy of an object is given by :
Where
m is the mass of an object
v is the velocity of an object
First option : A car driving down a road, the car is moving i.e. it will possess kinetic energy.
Second option : A soccer ball rolling down a hill, the ball is moving i.e. it will possess kinetic energy
Third option : A bicycle locked to a bike, neither bicycle nor bike is moving i.e. it will not possess kinetic energy.
Fourth option : A satellite orbiting Earth, the satellite is moving i.e. it will possess kinetic energy.
Hence, "a bicycle locked to a bike " has least amount of kinetic energy.
Answer:
Initial velocity = 10 m/s
θ = 60°
This is the case of projectile motion
So the horizontal component of velocity 10 m/s = 10 cosθ
u = 10 cosθ
u = 10 cos 60°
u=5 m/s
x= 5 m
So in the horizontal direction
x = u .t
5 = 5 .t
t = 1 sec The vertical component of velocity 10 m/s = 10 sinθ
Vo= 10 sinθ
Vo= 10 sin 60°
Vo = 8.66 m/s
h=3.75 m
So height of robot = 3.75 - 0.75 m
height of robot =3 m
